I keep being asked why an Inverter Air Conditioning Unit is better than a standard fixed speed compressor type unit. The answer is that a compressor varies its speed to match the cooling or heating load and therefore consumes only the power necessary to match the exact requirement of the room. In other words the compressor acts like the heart of the system. If you were to go running then your heart would speed up. This is great for burning the pounds. However imagine every time you walked your heart pumped at the running rate? A little scary as you might think you were having a heart attack. The point is you would burn high energy doing little work.
When an inverter driven air conditioning unit is operating at partial load (walking) the energy efficiency of the system is significantly higher than at full load. In a typical application (in an office for example), partial load conditions prevail 90% of the time. In other words once the office is nice and cool or warm the systems runs at a smaller load just to keep the room at that temperature. A fixed speed system can only run at 100%. Therefore for a fixed speed system, once the room needs additional heating or cooling, the system runs at 100%. The net effect of this is that it over heats or over cools depending on what cycle the system is on.
To refer to our example above, it would be like running to the January Sale then standing in a queue. This equates to using a lot of energy in the first instance such as trying to heat a cold room, then slowing down and moving ever so slightly in the queue which is the same as when the room is hot. However if every time the queue moved you ran, you would overtake a few people only to find out that you have to return to the same spot in the queue anyway.
Here in aac.ie we use only invertor driven systems!